Grove K, Verdiani L, Wilking B, Ziller W. Non-negative curvature obstructions in cohomogeneity one and the Kervaire spheres . Annali Scienze [Internet]. 2009Dec.4 [cited 2026Feb.20];5(2):159-70. Available from: https://journals.sns.it/index.php/annaliscienze/article/view/95